It is a Powerbook G4 15"
CPU type: PowerPC G4 (1.1)
CPU Speed: 1.33 GHz
L2 Cache (per CPU): 512 KB
Memory: 256 MB
Bus Speed: 167 MHz
Boot ROM Version: 4.8.6f0
You should have at least 1 Gig RAM on 10.5.8 for it to run smoothly but you might as well max out the RAM on your PowerBook if you are planning on keep it longer.I'd like to install a sufficient amount so that I can install and run OS 10.5.8 smoothly.